GED Science Test #5 3 Flashcards

Which of these correctly describes the relationship between wavelength and frequency for electromagnetic waves?

Answer: As wavelength increases, frequency decreases

For electromagnetic waves traveling at a constant speed (speed of light), wavelength and frequency are inversely proportional: c = λf. Longer wavelengths mean lower frequencies.

In genetics, a trait that is hidden when a dominant trait is present is called:

Answer: Recessive

A recessive trait is only expressed when an organism has two copies of the recessive allele (homozygous recessive). When paired with a dominant allele, the dominant trait is expressed.

Earth's revolution around the sun takes approximately:

Answer: 365.25 days

Earth completes one revolution (orbit) around the sun in approximately 365.25 days — one year. The extra 0.25 days accumulate, which is why we have a leap year every 4 years.

A scientist graphs her experimental data and the result is a straight line with a positive slope. This indicates:

Answer: A direct (positive) linear relationship between the variables

A straight line with a positive slope shows a direct linear relationship — as one variable increases, the other also increases proportionally. Correlation does not prove causation.

Which process describes the movement of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane?

Answer: Osmosis

Osmosis specifically describes the diffusion of water molecules across a semi-permeable membrane. Regular diffusion refers to the movement of any substance from high to low concentration.

The atomic number of an element equals:

Answer: The number of protons in the nucleus

The atomic number is the number of protons in the nucleus, which defines the element. For a neutral atom, the number of protons equals the number of electrons.